sympy/sympy — pull request #1819 by mrocklin (2013-02-22 01:38:18+00:00)
Title: Stats refactor 2

Another pull request in an ever exciting adventure to clean up the stats module.

This builds off of https://github.com/sympy/sympy/pull/1806 and https://github.com/sympy/sympy/pull/1811 . Those should be reviewed first.